Table 2 Handover strategy: S-conservative
From: Seamless internet 3G and opportunistic WLAN vehicular connectivity
Tree-depth | DRSU (m) | Density | Time 3G (s) | Time WLAN (s) | Offload (%) | # Handoffs | Improvement (%) |
|---|---|---|---|---|---|---|---|
2 | 1000 | LO | 13.99 ± 0.10 | 26.52 ± 0.10 | 65.47 | 1.14 | 20.60 |
|  | 1000 | HI | 12.63 ± 0.08 | 31.35 ± 0.08 | 71.28 | 1 | 28.70 |
|  | 2000 | LO | 57.33 ± 0.10 | 24.53 ± 0.10 | 29.97 | 1.29 | 5.66 |
|  | 2000 | HI | 63.58 ± 0.08 | 26.51 ± 0.08 | 29.43 | 1.19 | 5.54 |
|  | 3000 | LO | 98.54 ± 0.11 | 24.68 ± 0.11 | 20.03 | 1.24 | 4.54 |
|  | 3000 | HI | 109.54 ± 0.08 | 26.48 ± 0.08 | 19.47 | 1.13 | 1.80 |
3 | 1000 | LO | 13.29 ± 0.10 | 27.22 ± 0.10 | 67.19 | 1.09 | 17.51 |
|  | 1000 | HI | 12.47 ± 0.08 | 31.50 ± 0.08 | 71.64 | 1 | 28.07 |
|  | 2000 | LO | 57.79 ± 0.08 | 24.07 ± 0.08 | 29.41 | 1.38 | 7.67 |
|  | 2000 | HI | 63.59 ± 0.11 | 26.50 ± 0.11 | 29.41 | 1.24 | 5.60 |
|  | 3000 | LO | 99.38 ± 0.08 | 23.83 ±0.08 | 19.34 | 1.35 | 8.26 |
|  | 3000 | HI | 110.30 ± 0.10 | 25.73 ±0.10 | 18.91 | 1.21 | 4.78 |